This epic musical geek creation is called the gAtari-a musical instrument which uses the extremely limited sound capabilities of the Atari 2600 to make the kind of music hardcore gamers will love, and parents will classify as noise.

I don't fully understand how the device works, but here the creator cTrix attempts to explain how, and why, he came up with it:

The “gAtari” was my excuse to do something a little silly after I discovered that the Atari 2600 was more limiting than I realized! (31 pitches, minimal waveforms and only 2 channels!) I needed an EQ which could take a high voltage and drop it down to line level (Boss bass EQ) plus a way to hold loops between tracks and parts (Boss delay). So rather than have it “DJ” style config, I thought I make something a little more creative.

I hope the gAtari sparks a new trend in club music, doesn't the sweet sounds coming out of this thing make you wanna get up and shake your rump?